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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 882 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.105 × 4 =
  2. 2.67 × 4 =
  3. 3.154 × 4 =
  4. 4.73 × 8 =
  5. 5.27 × 8 =
  6. 6.47 × 8 =
  7. 7.22 × 4 =
  8. 8.73 × 4 =
  9. 9.117 × 4 =
  10. 10.96 × 4 =
  11. 11.125 × 4 =
  12. 12.28 × 8 =
  13. 13.29 × 4 =
  14. 14.27 × 8 =
  15. 15.26 × 4 =
  16. 16.105 × 4 =
  17. 17.93 × 4 =
  18. 18.137 × 4 =
  19. 19.15 × 4 =
  20. 20.29 × 8 =
  21. 21.134 × 4 =
  22. 22.38 × 4 =
  23. 23.29 × 8 =
  24. 24.34 × 8 =
  25. 25.38 × 4 =
  26. 26.32 × 4 =
  27. 27.97 × 4 =
  28. 28.28 × 8 =
  29. 29.87 × 4 =
  30. 30.88 × 4 =
  31. 31.51 × 4 =
  32. 32.52 × 4 =
  33. 33.16 × 8 =
  34. 34.58 × 8 =
  35. 35.132 × 4 =
  36. 36.55 × 8 =
  37. 37.83 × 4 =
  38. 38.106 × 4 =
  39. 39.14 × 8 =
  40. 40.106 × 4 =

Answer key

  1. 420
  2. 268
  3. 616
  4. 584
  5. 216
  6. 376
  7. 88
  8. 292
  9. 468
  10. 384
  11. 500
  12. 224
  13. 116
  14. 216
  15. 104
  16. 420
  17. 372
  18. 548
  19. 60
  20. 232
  21. 536
  22. 152
  23. 232
  24. 272
  25. 152
  26. 128
  27. 388
  28. 224
  29. 348
  30. 352
  31. 204
  32. 208
  33. 128
  34. 464
  35. 528
  36. 440
  37. 332
  38. 424
  39. 112
  40. 424

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